A/B Testing Definition
A/B testing is a way to compare two versions of a web page to determine which version is more effective. For example, you show two versions of a web page to similar visitors to see which one performs better.
Synonym: Split Testing
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How to Increase Conversions by Running...

The ability of a page or domain to rank well in search engines. Five large factors associated with site and page authority are link equity, site age, traffic trends, site history, and publishing unique original quality content.
Search engines constantly tweak their algorithms to try to balance relevancy algorithms based...

Affiliate marketing programs allows merchants to expand their market reach and mindshare by paying independent agents on a cost per action (CPA) basis. Affiliates only get paid if visitors complete an action.
Most affiliates make next to nothing because they are not aggressive marketers, have no real focus, fall for...

Topical authorities are sites which are well trusted and well cited by experts within their topical community. A topical authority is a page which is referenced from many topical experts and hub sites. A topical hub is page which references many authorities.
Example potential topical authorities:
the largest brands in your...

Some social networks or search systems may take site age, page age, user account age, and related historical data into account when determining how much to trust that person, website, or document. Some specialty search engines, like blog search engines, may also boost the relevancy of new documents.
Fresh content...

Pay per click search engines are growing increasingly complex in their offerings. To help large advertisers cope with the increasing sophistication and complexity of these offerings some search engines and third party software developers have created software which makes it easier to control your ad spend. Some of the...

It’s a ranking system that audits and makes public the frequency of visits on various web sites.
Source: Avangate
An Amazon.com owned search service which measures website traffic.
Alexa is heavily biased toward sites that focus on marketing and webmaster communities. While not being highly accurate it is free.

Web analytics is the collection, reporting, and analysis of website data. The focus is on identifying measures based on your organizational and user goals and using the website data to determine the success or failure of those goals and to drive strategy and improve the user’s experience.
Measuring Content
Critical to...

A link which shows the full URL of the page being linked at. Some links only show relative link paths instead of having the entire reference URL within the a href tag. Due to canonicalization and hijacking related issues it is typically preferred to use absolute links over relative...

Google's contextual advertising network. Publishers large and small may automatically publish relevant advertisements near their content and share the profits from those ad clicks with Google.
AdSense offers a highly scalable automated ad revenue stream which will help some publishers establish a baseline for the value of their ad inventory....

Google's advertisement and link auction network. Most of Google's ads are keyword targeted and sold on a cost per click basis in an auction which factors in ad clickthrough rate as well as max bid. Google is looking into expanding their ad network to include video ads, demographic targeting,...

Blind people and most major search engines are not able to easily distinguish what is in an image. Using an image alt attribute allows you to help screen readers and search engines understand the function of an image by providing a text equivalent for the object.
Example usage
<img src="http://www.seobook.com/images/whammy.gif" height="140"...

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